Honey, I Shrunk the Transport Geometry, or Carving Micro-Crystals of Topological Insulators for Transport Experiments

ORAL

Abstract

There exist a large number of new quantum materials that are difficult to characterize using standard electrical transport methods due to the inability to grow macroscopic crystalline samples. However, using standard TEM sample preparation methods, it is possible to carve 10s of microns size crystalline pieces and place them on an insulating substrate for transport characterization. We have demonstrated this method by carving a 2μm x 5μm x 10μm piece of SmB6 and placing it on a Si substrate. The Hall bar was subsequently wired using Pt contacts deposited via FIB. We are also developing more demanding transport structures, such as double-sided Corbino rings with the goal of studying transport through individual threading dislocations. We will present challenges associated with sample preparation at the micro crystalline scale.

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Presenters

  • Dmitri Mihaliov

    • Physics, University of Michigan
    • Department of Physics, University of Michigan

Authors

  • Dmitri Mihaliov

    • Physics, University of Michigan
    • Department of Physics, University of Michigan

  • Alexa Rakoski

    • Department of Physics, University of Michigan
    • University of Michigan
    • Physics, University of Michigan

  • Shriya Sinha

    • University of Michigan
    • Physics, University of Michigan

  • Cagliyan Kurdak

    • Department of Physics, University of Michigan
    • University of Michigan
    • Physics, University of Michigan

  • Priscila Rosa

    • Los Alamos National Laboratory
    • MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA
    • Condensed Matter and Magnet Sciences, Los Alamos National Laboratory

  • Zachary Fisk

    • University of California - Irvine
    • Department of Physics and Astronomy, University of California Irvine
    • University of California, Irvine
    • UC Irvine
    • Department of Physics and Astronomy, University of California- Irvine
    • Department of Physics and Astronomy, University of California - Irvine
    • Physics and Astronomy, University of California, Irvine

  • Boyoun Kang

    • Gwangju Institute of Science and Technology

  • Myung-suk Song

    • Gwangju Institute of Science and Technology

  • Beongki Cho

    • Gwangju Institute of Science and Technology